C++ 函數後面的const

原創 wangxiaopang1003 2020-05-21 17:05

C++函數後面加const的意義

  • 表示該函數是隻讀函數,不會改變數據成員
  • 提高了程序的可讀性
  • 一旦試圖改變數據成員的值,編譯器按錯誤處理
  • 非靜態成員函數後面加const(加到非成員函數或靜態成員後面會產生編譯錯誤)
  • 加了const的成員函數可以被非const對象和const對調用,但不加const的成員函數只能被非cosnt對象調用
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